One Touch Windows Options

[yellowchinaman]

So how does it know when to stop on a one touch?
A minor fault on my GT4 that the drivers side doesn't go all the way up at one click but always stop at a random point then I have to press it again to go all the way up.
At first I thought it was my switch but that's all cleaned out and checked and is ok.
What could the cause be and how do I resolve it?

[JoshuaM]

So how does it know when to stop on a one touch?
A minor fault on my GT4 that the drivers side doesn't go all the way up at one click but always stop at a random point then I have to press it again to go all the way up.
At first I thought it was my switch but that's all cleaned out and checked and is ok.
What could the cause be and how do I resolve it?

I pulled mine apart to have a look at it and it is all done with tiny electronics... My only recommendation would be to try with somebody elses switch because I think replacement to be by far the easiest solution.